An autocollimator for directly measuring the straightness of guide rails and having a splicing function

Abstract

The invention belongs to the field of autocollimators, and discloses an autocollimator for directly measuring the straightness of a guide rail and having a splicing function, comprising: a base, an oil pipe and a clamping assembly; the outer side of an airbag is slidably connected to the base, and the upper end of the base is fixed with the autocollimator, and a receiver is provided at the laser emitting end of the autocollimator; an oil circuit is provided on the inner side of the base, and both ends of the oil circuit are connected with multiple oil pipes, and piston rods are fixed at both ends of the reel, and piston rods are inserted at one end of the multiple oil pipes away from the base; two piston blocks are slidably connected to the inner side of the oil circuit, and a first rack is fixed between the two piston blocks, and the upper end of the first rack is meshed with a gear, the upper end of the gear is meshed with a second rack, and both ends of the second rack are fixed with clamping assemblies. The flow of damping fluid drives the gears to mesh, shifting the center of gravity of the second rack and making its two ends unbalanced, so that the two sides of the airbag are straightened and a trumpet shape can be formed when the airflow passes through. This can avoid the formation of bulges when the airbag passes through, and expand the diameter at the exit, thereby reducing the speed of passage by increasing the flow rate.

Description

Technical Field

[0001] The present invention belongs to the field of autocollimators, and in particular relates to an autocollimator for directly measuring the straightness of a guide rail and having a splicing function. Background Art

[0002] An autocollimator is an instrument that uses the principle of optical autocollimation to measure tiny angular deviations. It is widely used in precision measurements such as angle detection of optical components, platform flatness detection, wobble of mechanical shaft systems, and straightness detection of precision guide rails.

[0003] For example, an airbag guide rail with application number CN201410173996.6 uses a tubular airbag as a driving source, and utilizes the tubular airbag to inflate and extrude the slider to move along the guide rail; since the length of the airbag is not limited, guide rails of different lengths can be made;

[0004] However, in order not to affect the normal operation of the workshop, the straightness of the airbag guide rail is measured during operation. At this time, when the airflow in the airbag passes through the bottom of the autocollimator, it will expand upward to form a bulge and squeeze the base of the autocollimator, causing the center of the autocollimator to deviate from the receiver. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an autocollimator that directly measures the straightness of a guide rail and has a splicing function, thereby solving the problem in the prior art that when airflow passes through the airbag guide rail, the airbag guide rail is forced to form bulges on both sides of the autocollimator and impact the base of the autocollimator, thereby affecting the measurement accuracy of the autocollimator.

[0006] The purpose of this disclosure can be achieved through the following technical solutions:

[0007] An autocollimator for directly measuring the straightness of a guide rail and having a splicing function, comprising: a base, an oil pipe and a clamping assembly;

[0008] The outer side of the airbag is slidably connected to a base, and an autocollimator is fixed to the upper end of the base, and a receiver is provided at the laser emitting end of the autocollimator;

[0009] An oil circuit is provided inside the base, and both ends of the oil circuit are connected to multiple oil pipes, piston rods are inserted into the ends of the multiple oil pipes away from the base, and a reel is fixed between the multiple piston rods;

[0010] Two piston blocks are slidably connected to the inner side of the oil circuit, and a first rack is fixed between the two piston blocks, and a gear is meshed at the upper end of the first rack, and a second rack is meshed at the upper end of the gear, and clamping components are fixed at both ends of the second rack.

[0011] In some disclosures, slots are fixed on both sides of the first rack, and an insert block is provided on one side of the piston block close to the first rack, and the insert block is adapted to the slots.

[0012] In some disclosures, a rotating ring is provided at the connection between the oil circuit and the oil pipe, and a sealing ring is provided on the inner side of the rotating ring.

[0013] In some disclosures, a through groove is provided through the upper end of the oil circuit, a cross bar is fixed to the upper end of the through groove, and the cross bar is provided through the central axis of the gear.

[0014] In some disclosures, a guide groove is provided at the upper end of the second rack, and a support frame is provided at the upper end of the second rack, and through grooves are provided through both sides of the support frame, and the second rack extends outward from the through grooves.

[0015] In some disclosures, a plurality of telescopic rods are provided on the inner top surface of the support frame, and an annular protrusion is fixed to the lower end of the plurality of telescopic rods, and the annular protrusion is adapted to the guide groove.

[0016] In some disclosures, both ends of the second rack are provided with slots, and support rods are inserted into the inner sides of the slots.

[0017] In some disclosures, the clamping assembly includes a rotating seat, a support plate and a suction cup, the lower end of the support rod is fixed with the rotating seat, the lower end of the rotating seat is hinged with the support plate, and the lower end surface of the support plate is fixed with multiple suction cups.

[0018] In some disclosures, a fixing frame is fixed to the outer side of the autocollimator, a mounting plate is fixed by bolts between the fixing frame and the base, and a shock-absorbing pad is arranged between the fixing frame and the mounting plate.

[0019] In some disclosures, track protrusions are provided on both sides of the airbag, and the track protrusions are matched with the grooves.

[0020] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0021] A fixed connection is one where the parts or components are fixed without any relative movement;

[0022] A rotational connection is a connection between parts that allows the parts to rotate relative to each other;

[0023] Threaded connection is a detachable fixed connection with the advantages of simple structure, reliable connection, and convenient assembly and disassembly. It is widely used in the fields of mechanical engineering and connection structures.

[0024] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0025] Beneficial effects of the present disclosure:

[0026] 1. When the airflow in the airbag is about to pass through the base, it will hit the reel, thereby squeezing the damping fluid in the oil pipe into the oil circuit. When squeezing the damping fluid, it will absorb the potential energy generated by the impact and play a buffering role;

[0027] 2. At the same time, the flow of the damping fluid can drive the first rack to slide, and the meshing of the gear and the second rack can make the second rack slide laterally, so that the two ends of the second rack are unbalanced, and the airbags on both sides of the base are clamped by the clamping assembly, so that the two sides of the airbags are straightened and a trumpet shape can be formed when the airflow passes through, which can avoid the formation of bulges when the airbag passes through, and can also expand the caliber at the outlet, thereby reducing the speed of crossing by increasing the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is a schematic diagram of the overall structure of the base of an embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of an isometric cross-sectional structure of a base according to an embodiment of the present disclosure;

[0031] Figure 3 is a schematic diagram of the connection structure between the base and the support frame of an embodiment of the present disclosure;

[0032] Figure 4 is a schematic diagram of the installation structure of the base and the autocollimator of the embodiment of the present disclosure;

[0033] Figure 5 This is an embodiment of the present disclosure Figure 4 A schematic diagram of the top view structure of ;

[0034] Figure 6 This is an embodiment of the present disclosure Figure 5 AA section diagram in;

[0035] Figure 7 is a schematic diagram of the overall structure of an embodiment of the present disclosure;

[0036] Figure 8 is a schematic diagram of the connection structure of the oil pipe and the rotating ring in the embodiment of the present disclosure;

[0037] Fig. 9 It is a schematic diagram of the connection structure between the first rack and the piston block of an embodiment of the present disclosure.

[0038] In the figure: 1, air bag; 101, track protrusion; 2, autocollimator; 21, fixing frame; 3, receiver; 4, base; 41, groove; 42, through groove; 43, cross bar; 5, reel; 51, piston rod; 52, oil pipe; 53, oil circuit; 54, piston block; 55, rotating ring; 551, sealing ring; 541, plug block; 6, first rack; 61, slot; 7, gear; 8, second rack; 81, guide groove; 82, slot; 9, support rod; 10, rotating seat; 11, support plate; 12, suction cup; 13, support frame; 131, through groove; 14, telescopic rod; 141, annular protrusion; 15, mounting plate; 16, shock pad. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] According to the concept of this application, Figures 1 to 7 The following describes an embodiment of an autocollimator for directly measuring the straightness of a guide rail and having a splicing function. Specifically, the autocollimator is constructed as a split structure, which has three components, namely, a base 4, an oil pipe 52, and a clamping assembly. When the airflow in the airbag 1 is about to pass through the base 4, it will hit the reel 5, thereby squeezing the damping liquid in the oil pipe 52 into the oil circuit 53. When squeezing the damping liquid, the damping liquid will absorb the potential energy generated during the impact, and play a buffering role. At the same time, the flow of the damping liquid can drive the first rack 6 to slide, and through the meshing of the gear 7 and the second rack 8, the second rack 8 slides horizontally, thereby making the two ends of the second rack 8 unbalanced, and the airbags 1 on both sides of the base 4 are clamped by the clamping assembly, so that the two sides of the airbag 1 are straightened and the airflow can form a trumpet shape when passing through, which can not only avoid the formation of a bulge when the airbag 1 passes through, but also expand the caliber at the outlet, and reduce the speed of passing through by increasing the flow rate.

[0041] Please refer to Figures 1 to 7 , an autocollimator for directly measuring the straightness of a guide rail and having a splicing function, comprising: a base 4, an oil pipe 52 and a clamping assembly;

[0042] The outer side of the airbag 1 is slidably connected to a base 4, and an autocollimator 2 is fixed to the upper end of the base 4, and a receiver 3 is provided at the laser emitting end of the autocollimator 2;

[0043] An oil passage 53 is provided inside the base 4, and both ends of the oil passage 53 are connected to multiple oil pipes 52, and piston rods 51 are inserted into the ends of the multiple oil pipes 52 away from the base 4, and a reel 5 is fixed between the multiple piston rods 51;

[0044] Two piston blocks 54 are slidably connected to the inner side of the oil passage 53, and a first rack 6 is fixed between the two piston blocks 54, and a gear 7 is meshed at the upper end of the first rack 6, and a second rack 8 is meshed at the upper end of the gear 7, and clamping components are fixed at both ends of the second rack 8;

[0045] Both ends of the oil circuit 53 are penetrated with perforations, the inner side of the oil pipe 52 is a hollow tube, and one end of the oil pipe 52 passes through the perforation to form a communication state with the oil circuit 53, so that the damping fluid inside the oil pipe 52 can pass through the perforation to enter the oil circuit 53. When the airflow moves from the left end to the right end in the airbag 1, the airflow drives the airbag 1 to expand outward and pushes the airbag 1 upward. Since the reel 5 forms a sliding structure with the oil pipe 52 through the piston rod 51, a piston block 54 is slidingly provided on the inner side of the oil circuit 53, and the moving path of the piston block 54 is consistent with the path of the oil circuit 53, thereby driving the reel 5 and the piston rod 51 to move along the direction of the oil pipe 52 toward the direction close to the base 4, and the piston rod 51 squeezes the oil during movement. The damping fluid in the tube 52 pushes the piston block 54 to slide laterally along the oil circuit 53 through the damping fluid, and utilizes the resistance of the damping fluid and the piston block 53 moving in the oil circuit 53 and the oil tube 52 to absorb the impact energy of the airflow impacting the reel 5, which can cushion the impact on the base 4, and after the first round of strong airflow passes through, the reel 5 slides downward along the direction of the oil tube 52 under the influence of gravity and gradually resets, so that the damping fluid flows back from the oil circuit 53 to the oil tube 52, and with the reflux of the damping fluid, the piston block 54 and the first rack 6 are pushed to move to the center position, thereby realizing automatic reset to avoid the reel 5 from compressing the airbag 1 after the airflow movement is stable, thereby reducing the flow channel in the airbag 1, thereby realizing automatic adjustment.

[0046] The first rack 6 is used to trigger the movement of the second rack 8. The damping fluid can push the first rack 6 to slide, thereby driving the gear 7 to mesh with the second rack 8, thereby driving the second rack 8 to move laterally and changing the center of gravity of the second rack 8, so that the center of the second rack 8 deviates from the gear 7, resulting in a height difference between the two ends of the second rack 8. Both ends of the rack 8 are fixed with clamping components. When the two groups are raised and lowered respectively, the position of the airbag 1 on the clamping component can be changed, and when the airflow passes through the base 4, the airbag 1 is restricted by the clamping component to be deformed and straightened, thereby forming a trumpet shape on both sides of the base 4. It can not only avoid the formation of bulges when the airflow passes through the airbag 1, but also expand the diameter of the airflow after passing through the base 4. By increasing the gas flow rate, the speed of passing through is reduced, which is beneficial to improving the stability of the device. After the force applied to the reel 5 tends to be stable, the damping fluid flows back under the influence of gravity, thereby resetting the first rack 6 and enabling the center of gravity of the second rack 8 to be re-located to the upper end of the gear 7. At this time, the two sets of clamping components tend to be parallel, thereby making the entire section of the airbag 1 tend to be parallel, so that after the first airflow passes through, the airbag 1 can be laid flat in time to facilitate the subsequent airflow to pass through the base 4 smoothly.

[0047] like Figure 8 As shown, a rotating ring 55 is provided at the connection between the oil circuit 53 and the oil pipe 52, and a sealing ring 551 is provided on the inner side of the rotating ring 55. When the reel 5 is lifted, it can drive the oil pipe 52 to rotate along the rotating ring 55, thereby increasing the movable range of the oil pipe 52 and avoiding jamming. At the same time, a sealing ring 551 is provided between the oil pipe 52 and the rotating ring 55, thereby improving the sealing performance of the connection between the oil pipe 52 and the oil circuit 53, improving the air tightness of the device, and avoiding leakage of the damping fluid.

[0048] like Fig. 9 As shown, slots 61 are fixed on both sides of the first rack 6, and an insert block 541 is provided on one side of the piston block 54 close to the first rack 6, and the insert block 541 is adapted to the slot 61. By inserting the insert block 541 of the piston block 54 downward along the upper end of the slot 61, the first rack 6 and the piston block 54 can be fixed, so that the piston block 54 and the first rack 6 move synchronously, and the damping fluid in the oil circuit 53 can be prevented from flowing out.

[0049] A through groove 42 is provided at the upper end of the oil circuit 53, and the gear 7 can pass through the through groove 42 and mesh with the first rack 6 below the through groove 42. The through groove 42 can reduce the contact area between the oil circuit 53 and the external space, thereby preventing impurities from falling into the oil circuit 53, and a cross bar 43 is fixed to the upper end of the through groove 42, and the cross bar 43 passes through the central axis of the gear 7. The gear 7 is fixed by the cross bar 43 to limit the position of the gear 7, which is beneficial to improving the stability of the gear 7.

[0050] A guide groove 81 is provided at the upper end of the second rack 8, and a support frame 13 is provided at the upper end of the second rack 8, and through grooves 131 are provided on both sides of the support frame 13. The second rack 8 extends outward from the through grooves 131. After the second rack 8 slides, its center deviates from the gear 7. At this time, the second rack 8 rotates with the contact point with the gear 7 as the center, and the two sides of the second rack 8 slide along the inner wall of the through groove 131. The second rack 8 is restricted by the through grooves 131 to prevent the second rack 8 from deviating from the track, which is beneficial to improve the stability of the movement of the second rack 8. A plurality of telescopic rods 14 are provided on the inner top surface of the support frame 13, and an annular protrusion 141 is fixed at the lower end of the plurality of telescopic rods 14, and the annular protrusion 141 is adapted to the guide groove 81, the annular protrusion 141 is inserted into the guide groove 81, and the side wall of the annular protrusion 141 is tangent to the inner wall of the guide groove 81, and at the same time, when the second rack 8 rotates, the telescopic rod 14 can be pulled to make the annular protrusion 141 slide in the guide groove 81, and the telescopic rod 14 and the annular protrusion 141 can provide a first supporting force for the second rack 8, which can prevent the second rack 8 from disengaging from the gear 7, and can further restrict the second rack 8, which is beneficial to improve the stability of the rotation of the second rack 8. At the same time, since the telescopic rod 14 does not exert any downward pressure on the second rack 8 except its own gravity, the second rack 8 is convenient to tilt and the rotation of the second rack 8 is avoided.

[0051] Slots 82 are provided at both ends of the second rack 8, and a support rod 9 is inserted into the inner side of the slot 82. A bolt connection is provided at the connection between the slot 82 and the support rod 9, so that the second rack 8 and the support rod 9 can be disassembled, which is beneficial for disassembly and transportation between the two during transportation, avoiding damage to the support rod 9 during transportation, and facilitating storage for users.

[0052] The clamping assembly includes a rotating seat 10, a support plate 11 and a suction cup 12. The lower end of the support rod 9 is fixed with a rotating seat 10, and the lower end of the rotating seat 10 is hinged with a support plate 11, and a plurality of suction cups 12 are fixed to the lower end surface of the support plate 11. The rotating seat 10 is hingedly composed of two cylindrical connecting rings. The support rod 9 is connected to the support plate 11 through the rotating seat 10. The suction cup 12 is adsorbed on the airbag 1. When the airbag 1 is passed by the airflow, its surface undergoes a wavy deformation, thereby driving the suction cup 12 and the support plate 11 to rotate along the rotating seat 10. When there is a slight change on the surface of the airbag 1, the synchronization between the airbag 1 and the clamping assembly can be maintained, and the stability of the support plate 11 and the suction cup 12 can be maintained in response to the change of the airbag 1. The material of the plurality of suction cups 12 is silicone rubber, which is soft. When adsorbed on the airbag 1, it can avoid damaging the airbag 1, which is beneficial to protecting the airbag 1. The adsorption by the suction cup 12 is convenient and the adsorption is firm.

[0053] A fixing frame 21 is fixed to the outside of the autocollimator 2, and a mounting plate 15 is fixed by bolts between the fixing frame 21 and the base 4, and a shock-absorbing pad 16 is arranged between the fixing frame 21 and the mounting plate 15. By passing the bolts through the mounting plate 15, the shock-absorbing pad 16 is used to alleviate the impact between the mounting plate 15 and the autocollimator 2, which is beneficial to improve the stability of the autocollimator 2 through the shock-absorbing pad 16. The fixing frame 21 is used to fix the autocollimator 2, so that the through hole on the autocollimator is tightened above the base 4, and the autocollimator 2 and the base 4 can be disassembled by bolting, which is convenient for disassembly, storage and transportation.

[0054] Track protrusions 101 are provided on both sides of the airbag 1, and the track protrusions 101 are adapted to the grooves 41, so that the grooves 41 on the inner side of the base 4 coincide with the track protrusions 101, and the base 4 can slide along the grooves 41, which is convenient for adjusting the autocollimator 2 on different sections.

[0055] In the following, in conjunction with the accompanying drawings and implementation examples, a self-collimator for directly measuring the straightness of a guide rail and having a splicing function provided by the present invention is further described.

[0056] Before use, insert the support rod 9 into the slots 82 at both ends of the second rack 8 and fix them with bolts, then install the support frame 13 on the upper end surface of the base 4, and insert the second rack 8 into the through slot 131, and first install and fix the fixing frame 21 and the autocollimator 2, and then install the mounting plate 15, the shock-absorbing pad 16, and the assembled fixing frame 21 and the autocollimator 2 on the upper end of the base 4 in sequence with bolts, and snap the groove 41 of the base 4 into the outer side of the track protrusion 101 along the end of the airbag 1, thereby completing the connection between the guide rail and the base 4, and adsorbing multiple suction cups 12 in parallel on the top of the airbag 1, at this time, the reel 5 rotates downward along the hinge with the base 4 until the reel 5 contacts the airbag 1.

[0057] When in use, the airflow in the airbag 1 moves from one end of the airbag 1 to the other end. When the airflow approaches the base 4, it contacts the reel 5 and provides a lateral thrust to the reel 5, thereby pushing the piston rod 51 to be inserted inward along the oil pipe 52, and pushing the internal damping fluid into the oil circuit 53, thereby pushing the piston block 54 and the first rack 6 to slide laterally, and driving the gear 7 to rotate with the cross bar 43 as the center of the circle, and driving the center of gravity of the second rack 8 to offset from the gear 7. At this time, the side wall of the second rack 8 slides on the inner side of the groove 131, and at the same time, the two sets of telescopic rods 14 provide an upward supporting force for the second rack 8. Since the second rack 8 is tilted, the clamping components on both sides are not on the same horizontal plane, and one side of the airbag 1 is pulled up, and the other side of the airbag 1 is pressed until the airbag 1 is straightened. At this time, the airbags 1 on both sides of the base 4 are in a trumpet shape. When the airflow passes through When the airbag 1 is under the base 4, the flow rate passing through can be weakened due to the increase in the outlet, and because the airbag 1 is in a stretched state, when the airflow passes through, the airbag 1 will not be deformed or bulged, thereby preventing the airbag 1 from hitting the base 4, which is beneficial to avoid misalignment between the autocollimator 2 and the receiver 3. At the same time, after the first airflow passes through the base 4, the subsequent airflow tends to be stable, and the reel 5 extends downward under the influence of gravity. At the same time, the damping oil in the oil circuit 53 flows back to the oil pipe 52, and the first rack 6 is reset, and drives the gear 7 and the second rack 8 to rotate, so that the two groups of clamping components move to the same horizontal plane, which is convenient for the subsequent airflow to pass through. When the subsequent airflow passes through, the surface of the airbag 1 floats, thereby driving the support plate 11 and the suction cup 12 to rotate along the hinge of the rotating seat 10, so that it can rotate according to the movement of the airbag 1.

[0058] At the same time, the laser emitted by the collimator 2 irradiates the receiver 3, and the straightness of the guide rail is detected by checking whether the laser received by the receiver 3 is within the collimator.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. An autocollimator for directly measuring the straightness of a guide rail and having a splicing function, characterized in that: include: Base (4), oil pipe (52) and clamping assembly; The outer side of the airbag (1) is slidably connected to a base (4), an autocollimator (2) is fixed to the upper end of the base (4), and a receiver (3) is provided at the laser emitting end of the autocollimator (2); An oil circuit (53) is provided on the inner side of the base (4), and both ends of the oil circuit (53) are connected to a plurality of oil pipes (52), and piston rods (51) are inserted into the ends of the plurality of oil pipes (52) away from the base (4), and a reel (5) is fixed between the plurality of piston rods (51); Two piston blocks (54) are slidably connected to the inner side of the oil circuit (53), and a first rack (6) is fixed between the two piston blocks (54), and the upper end of the first rack (6) is meshed with a gear (7), and the upper end of the gear (7) is meshed with a second rack (8), and both ends of the second rack (8) are fixed with clamping assemblies.

2. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 1, characterized in that: Slots (61) are fixed on both sides of the first rack (6), and an insert block (541) is provided on one side of the piston block (54) close to the first rack (6), and the insert block (541) is adapted to the slots (61).

3. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 2, characterized in that: A rotating ring (55) is provided at the connection between the oil circuit (53) and the oil pipe (52), and a sealing ring (551) is provided on the inner side of the rotating ring (55).

4. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 3, characterized in that: A through groove (42) is provided through the upper end of the oil passage (53), a cross bar (43) is fixed to the upper end of the through groove (42), and the cross bar (43) is provided through the central axis of the gear (7).

5. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 1, characterized in that: A guide groove (81) is provided at the upper end of the second rack (8), and a support frame (13) is provided at the upper end of the second rack (8), and through grooves (131) are provided on both sides of the support frame (13), and the second rack (8) extends outward from the through grooves (131).

6. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 5, characterized in that: The inner top surface of the support frame (13) is provided with a plurality of telescopic rods (14), and an annular protrusion (141) is fixed to the lower end of the plurality of telescopic rods (14), and the annular protrusion (141) is adapted to the guide groove (81).

7. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 5, characterized in that: Both ends of the second rack (8) are provided with clamping grooves (82), and a support rod (9) is inserted into the inner side of the clamping groove (82).

8. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 7, characterized in that: The clamping assembly comprises a rotating seat (10), a support plate (11) and a suction cup (12); the lower end of the support rod (9) is fixed with the rotating seat (10), the lower end of the rotating seat (10) is hinged with the support plate (11), and the lower end surface of the support plate (11) is fixed with a plurality of suction cups (12).

9. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 1, characterized in that: A fixing frame (21) is fixed to the outside of the autocollimator (2), a mounting plate (15) is fixed between the fixing frame (21) and the base (4) by bolts, and a shock-absorbing pad (16) is provided between the fixing frame (21) and the mounting plate (15).

10. The autocollimator for directly measuring the straightness of a guide rail and having a splicing function according to claim 1, characterized in that: Track protrusions (101) are provided on both sides of the airbag (1), and the track protrusions (101) are adapted to the grooves (41).

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